53166021 has 16 divisors (see below), whose sum is σ = 76334400. Its totient is φ = 32791808.

The previous prime is 53166013. The next prime is 53166037. The reversal of 53166021 is 12066135.

It is a cyclic number.

It is not a de Polignac number, because 53166021 - 2³ = 53166013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53165982 and 53166000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53166011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5826 + ... + 11843.

It is an arithmetic number, because the mean of its divisors is an integer number (4770900).

Almost surely, 2^53166021 is an apocalyptic number.

53166021 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

53166021 is a deficient number, since it is larger than the sum of its proper divisors (23168379).

53166021 is a wasteful number, since it uses less digits than its factorization.

53166021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17748.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 53166021 is about 7291.5033429328. The cubic root of 53166021 is about 376.0203818927.

The spelling of 53166021 in words is "fifty-three million, one hundred sixty-six thousand, twenty-one".